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A Guide to First Input Delay (FID): What is it and why does it matter?


What is first input delay

Input delay is a measure of the time that elapses between when a user first interacts with your website and when they see their input reflected on the page. First Input Delay (FID) can be measured in milliseconds, so it's possible to have an FID of anywhere from 0ms-500ms. This article will explore what First Input Delay is, how it affects users, and why you should care about it!


So what is First Input Delay (FID) and why does it matter?


First Input Delay is the time between when a user first interacts with your website and when they see their input reflected on the page. This might mean that there's some kind of delay in loading or processing content, which means users are waiting for something to happen. First Input Delay (FID) can be measured in milliseconds, so it's possible to have an FID of anywhere from 0